I work in a place called Tyson's corners in Northern Virginia. The quake was felt hard here. I'm in a 4 story concrete frame building and it really shook. Fortunately there was only minor damage - some displaced ceiling tile and some minor cracking of sprayed on stucco like coating in one of the stairways. However, there were a few low rise masonry buildings that had quite a bit of damage. In Manassas where I live, we experienced very little. I didn't even have anything fall off the shelves. In Culpepper VA, a lot of older brick structures suffered significant damage. I am experiencing some problems with my weather station at Massanutten VA. I still have power but one PC is off line and the other does not seem to be transmitting to my web site or Weather Underground. They went off line about the time of one of the after shocks. I'll get them back on line (hopefully) on Friday. From what I can tell it is not a serious problem. Hopefully just a power glitch.